CBSE Class 10 Science Chapter 5 Periodic Classification of Elements

NCERT / CBSE Solutions for Class 10 Chapter 5 Periodic Classification of Elements Best notes, Video Classes, Live Problem Classes, Worksheet, Test Exam Paper

Chapter 5 Periodic Classification of Elements Class 10

Dobereiner’s Triads

Newland’s Law of Octaves

Limitations of Newland’s Law of Octaves

Mendeleev’s Periodic Table

Mendeleev’s Periodic Law

Periodicity of Properties

Limitations of Mendeleev’s Periodic Table

The Modern Periodic Table

Modern Period Law

Trends in Modern Periodic Table

(i) Valency
(ii) Atomic size
(iii) Metallic character
(iv) Non-metallic character
(v) Chemical Reactivity
(vi) Electronegativity
(vii) Nature of Oxides

what is Group in Modern Periodic Table

The vertical columns in Mendeleev’s, as well as in Modern Periodic Table, are called groups. and total number of group is 18.

What is Period in Modern Periodic Table

The horizontal rows in the Modern Periodic Table and Mendeleev’s Periodic Table are called periods and total number of period is 7.

Atomic size

The trend of atomic size (radius) in moving down a group

The trend of atomic size (radius) in moving from left to right in a period

Characteristics of triads of J.W. Dobereiner

Mendeleev’s Periodic Law

Merits of Mendeleev’s Periodic Table

Limitations of Mendeleev’s classification

Modem Periodic Law

Properties of elements are the periodic function of their atomic number.

Groups and periods in the Modem (long form) Periodic Table

Trends in Mendeleev’s Periodic Table

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